This is a Hangar 9 2.75" Aluminum P51 Spinner. Hangar 9 has the solution
for general and large electric aircraft enthusiasts looking to complete
the look of their plane – with this exceptional, perfectly balanced
aluminum spinner assembly! Hangar 9 spinners are the only spinner
assemblies that offer a high-quality product at a value price. There are
six spinner sizes ranging from 2.5 inches to 3.5 inches, as well as
five adapter kits, offering you the parts and flexibility necessary to
easily to adapt to all glow, gas and electric power applications.

Features:

CNC machined from bar stock aluminum for superior quality

P-51 shape looks great on most of the models on the market

Standard 10-32 single bolt mounting system makes it interchangeable with TruTurn adapter kits

Adapter kits available for all standard crankshaft sizes to make it easy to adapt to all glow, gas and EP options